Phasors

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After completing this section, students should be able to do the following.

Remember the cosine-referenced phasor transformation equation.
Apply phasor transformation to transform time-domain circuit equations for a resistor, capacitor, and inductor to the frequency domain.
Apply phasor transformation to transform time-domain sinusoidal signals to frequency-domain signals (phasors) and vice versa, transform phasors to time-domain.
Explain the phasors theory in terms of a superposition of two signals.
Solve a simple electric circuit using phasors.
Sketch vector phasor diagram to visualize voltage and current addition.
Visualize and sketch sinusoidal voltages and currents in time-domain for simple RC, RL circuits.
Recognize a simple circuit from the visualized time-domain or phasor voltages and currents.